Molding-machine.



M. L. HEYL & J. J. LAWLOR.

MOLDING MACHINE.

APPLICATION FILED SEPT. 13, 1909. 968,560. Patented Aug. 30, 1910. 2 SHEETS-SHEET 1.

INVENTORS.

2r. f b L waz M. L. HEYL & J. J. LAWLOR.

MOLDING MACHINE.

APPLIOATION FILED SEPT. 13, 1909.

2 SHBE Patented Aug. 30, 1910.

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UNITED STATES PATENT OFFICE.

MARTIN L. HEYL AND JOHN J. LAWLOB, 0F ZELENOPLE, PENNSYLVANIA.

momma-mom Specification of Letters Patent. Patented Aug, 3t), 1910.

Application filed September 13, 1909. Serial No. 517,524.

To all whom 'it may concern:

Be it known that we, MARTIN L. Herr.

and J omv J. LAWLOR, residents of Zelienople, in the county of Butler and State of Pennsylvania, have invented a new and useful Improvement in Molding-Machines; and we do hereby declare the following to be a full, clear, and exact description thereof.

0111' invention relates to molding machines and more particularly to that type in which the flask containing the patterns is jarred so as to distribute the sand evenly and compactly around the pattern in the flask.

The object of our invention is to provide a machine of this character which is simple and durable in construction and in which the valve mechanism for raising a plunger to the table is operated automatically, in a quick and efficient manner and at the same time is simple in construction so that it is not liable to get out of order.

To these ends our invention comprises the novel features hereinafter set forth and claimed.

In the drawings Figure 1 is a sectional elevation of our improved machine; Fig. 2 is an enlarged sectional view of the valve mechanism in elevation; Fig. 3 is a view showing the valve mechanism released; Fig. 4: is a plan view of same; Fig. 5 is a cross section on line (5-5) Fig. 1.

In the drawings, the numeral 2 designates a suitable foundation of concrete or other material upon which the timbers 3 are supported. These timbers form the support for the frame 4. This frame 1 has the plate 5 which rests upon the timbers 3, and interosed between said plate and said timbers IS the rubber or like elastic pad 6, which provides the proper resiliency when the machine is in action. The frame 4 has the cylinder 7 to receive the plunger 8 of the table 9. At intervals on the plate 5 of the frame 4 are the posts or uprights 10 provided with the seats 11, Within which the jarring blocks 12 are removabl-y secured, said blocks projecting above the posts 10. The table 9 has the studs or projections 13 which are adapt- .ed to engage the blocks 12. These blocks 12 may be formed of hardened steel and pos sess great durability. Being freely removable, they may be replaced from time to time if they become worn. Furthermore said-blocks maybe raised or lowered by the use of shims so as to have a perfect level.

Bolted or otherwise secured to the frame 4 is the bracket 14 which supports the valvemechanism. This valve-mechanism comprises the cylinder 15 within which is the piston-valve 16 with the annular groove 17. The stem 18 is connected to the'valve 16, said stem passing out through the upper end of the cylinder 15. In addition to the stem 18, there is the lower sub-stem 19 which engages a guide 20 in a spider 20 and in this manner the valve is guided above and below. The piston-valve 16 has the spider 16 forming the passages 16 extending through the valve and forming communication between the upperand lower ends of the cylinder 15. The lower end of the cylinder 15 communicates withthe atmosphere by reason of the spider 20 The upper end of the valve-stem 18 has the hook-like portion with the inwardly projecting portion 21. Arm 22 is pivoted at 23 to the bracket 14, and the outer end of said arm has the lug 24: which engages the lower face of the projecting portion 21 of the valve-stem. The outer end of the arm 22 is connected by the rodr25 to the table 9. The turn-buckle 26 may be inserted in the rod 25 for purposes of adjustment. On the stem 18 is the nut 27 which has the beveled face 28. A dog 29 is pivoted at 30 tothe bracket 14. A second dog 31 is pivoted opposite the dog 29 upon the bracket 32 supported from the cylinder 15. An arm 33 is mounted on the pin supporting the dog 31 and the upper end of said arm has the cam 34 with which the nose 35 of the arm 22 is adapted to engage The nose 35 normally engages the face 36 above the cam-portion 34. of the arm 33.

The link 37 is connected to the arm 33 and to the dog 29. The'upper ends of the dogs 29 and 31 normally engage the bev eled face 28 of the nut 27 and support the valve-stem in its raised position. A spring 38 is connected to the lower end of the dog 31 to the bracket 32.

A spring 39 is interposed between the' head of the cylinder 15 and the piston valve 16. The cylinder 15 has the inlet pipe 40 which admits the motive fluid to the annular space 17 of the piston valve 16, and the passage 41 leads from the cylinder 15 to the port 42 leading to the lower end of the cylinder 7.

When our improved molding machine is in use, the mold containing the patterns in the sand is placed upon the table 9, and the parts of the valve-mechanism will be in the, position indicated in full lines Fig. 2. Air or other motive fluid is admitted by the inlet 40 to the cylinder and said motive fluid upon entering the annular groove 17 will pass from said groove into the passage 41 and thence by the port 42 to the lower end 1 of the cylinder 7. The plunger 8 within the cylinder 7 will be raised and the table 9 with it. As the table 9 ascends the rod 25 will raise the inner end of the lever 22, and the outer end of said lever will be correspondingly lowered. As the outer end of said lever is lowered, the nose 35 thereof travels along the face 36 of the arm 33, until said nose reaches the cam portion 34, whereupon the arm 33 will be moved outwardly to the position indicated in the dotted lines Fig. 2 or full lines Fig. 3. This outward movement of the arm 33 acts to move the dog 31 from engagement with the nut 28 and through the link 37 the dog 29 will be simultaneously moved'out of engagement with the nut 27 and this will give the spring 39 opportunity to lower the piston-valve l6 and the valve-stem l8 to the position indicated in F ig.'3. Before, however, the valve is lowered to this extent, the table 9 will have reached the extent of its upper stroke, and when the dogs 29 and 31 are released the descent of the valve will cut off the supply of motive fluid to the cylinder 7 and the weight of the table 9 and the mold carried thereon, will cause said table to descend of its own weight. The exhaust from the lower end of the cylinder 7 taking place through the port 42, passage 41 into the cylinder l5 and down through the hollow piston-valve and out through the openings in the spider 2O at the lower end of said cylinder. By having the piston valve with the passage extending through it communicat- 1ng with the atmosphere a vacuum is pre vented. The table 9 descends as above stated of its own weight, and consequently with considerable velocity, 'so that the studs 13 of said table will strike the blocks 12 with considerable force so as to jar the sand with in the mold and tend to pack it tightly around the patterns. The jar occasioned by the descent of the table 9 in this way, is to a certain extent, taken up-by the rubber pad 6 which relieves the strain on the machine and the valve-mechanism carried thereby. At-the same time the table 9 has its impact directly upon the hard blocks 12, which will tend to give a greater jarring action to the sand within the molds and pack the same with greater efiectiveness. When the table descends in this way, the rod 25 will be of motive fluid to said arm and said valve-stem,

eeaeeo 'lowered and. the lug 24:, being engage ment with the projecting portion 21 of the valve-stem, will act to lift the valve-stem and valve until the nut 27 carried lay the valve-stem passes above the upper ends of the dogs 29 and 31, whereupon the spring 38 will act to throw the dogs into engagement with the nut 27 and so hold the valve in its raised position to again admit the motive fluid to -the lower end of the cylinder 7.

The jarring strokes take place in quick succession and the valve-mechanism acts with great accuracy and precision. The parts of the valve-mech are few and simple in construction, so that valve-mechanism is not liable to get out of order, and the repairs are accordingly reduced to a minimum. By the employment of the helllow piston valve the exhaust inder 7 passes down through said valve and through the open end of the cylinder 15. The descent of the piston-valve does not create a vacuum and consequentl it does not suck or draw in the sand or at er gritty material which is floating in the atmosphere and which is very injurious to the packing and other parts of the valve-mechanism.

What we claim is:

1. In a molding machine combination with suitable frame, of a cylinder, a. table, a plunger on said table engaging said cylinder, a spring actuated piston valve controlling motive fluid supply to said cylinder, a valve-stem, dogs engaging said valve-stem, a movable arm connected to one of said dogs, connections between said dogs for simultaneous operation of same, and means for moving said arm by themovement of said table to release said do 2. In a molding machine, combination with suitable frame, of a cylinder, 2. table, a plunger engaging said cylinder, a spring actuated piston-valve controlling the supply cylinder, a valve stem, locking dogs engaging said valvestem, a cam-arm connected to one of said dogs, connections between' said dogs for simultaneous movement thereof, a lever en-- gaging said cam-arm, and connections between said lever and said table.

'3. In a molding with a suitable frame,of a cylinder, a table, a plunger engaging said cylinder, 2. actuated piston-valve contro supply of motive fluid to cylinder, a valve-stem,-dogs engaging said valve-stem, connections between said dogs for the simultaneous operation of samefa cam-arm connected with one of said dogs, a lever engaging said camand connections between said lever and said table.

4. In a molding machine, combination with suitable frame, of a cylinder, at table, a plunger engaging said cylinder, a spring horn the cylmachine, combination actuated piston valve controlling the sup"- ply of motive fluid to said cylinder, a valvestem, a nut on said valve-stem having bev eled faces, a dog engaging said beveled faces, and means for releasing said dog by the movement of said table.

5. In a molding machine, combination with a suitable frame, of a cylinder, a table,

a plunger engaging said cylinder, :1 spring actuated piston-valve controlling supply of motive fluid to said cylinder, a valve-stem, a locking-dog engaging said valve stem, a

cam-arm connected to said dog, a lever engaging said cam-arm and connections between said lever and said table;

In testimony whereof, we the said MARTIN L. HEYL and JOHN J. LAWLOR have hereunto set our hands.

MARTIN L. HEYL. JOHN J. LAWLOR.

Witnesses:

E. R. JOSHUA, J. W. DAVIS. 

